Firstyou should open the door but you should not run outit is very dangerous.Next when you find the furnitures are shake you should hide under the firmness furniture for about one minute.Then when you find the earthquake you should close the fire at once.Finallyyou should protect you head ...
a regular road map is the way to go. But if you've strayed from the road, perhaps on a backpacking trek, you need to see the terrain and the contours of the land. And that means you need to be able to read atopographic map. ...
But when exactly does the Atlantic hurricane season of 2024 start, and how long does it last? And how do hurricanes form? What can people do to prepare in the face of the most dangerous storms on Earth? The 2024 Atlantic hurricane season is predicted to bring a record-breaking number of...
How the Universe Works《了解宇宙是如何运行的(2010)》第六季第五集完整中英文对照剧本.docx,神秘的光 Mysterious lights 来自遥远的深空,它的亮度 shine out from the edge of space, 比一万亿颗太阳还要亮 brighter than a trillion suns. 它们一定是我们在宇宙中见过
This is the experience of hang gliding. The hang glider's wing, called a delta wing or Rogallo wing, is an outgrowth of NASA engineer Francis Rogallo's research on kites and parachutes in the 1960s. Rogallo had proposed the wing as a method of returning spacecraft to Earth. The ...
The lineup: Venus, the evening beacon By far, the most prominent of the five planets is Venus. Although it reached its greatest angular distance east of the sun on Jan. 10, it continues to shine brilliantly in the west-southwest sky at dusk throughout February — a breathtaking evening la...
"Our job is to work together with people from all over the world to build vehicles and spacecraft to safely live in the space environment to explore the Universe," Melvin wrote in an email. "We do cutting edge biological and material research that can save lives on Ea...
Launching the Space Shuttle One of the space shuttle's main engines Photo courtesy NASA To lift the 4.5 million pound (2.05 million kg) shuttle from the pad to orbit (115 to 400 miles/185 to 643 km) above the Earth, the shuttle uses the following components: two solid rocket boosters...
A light year is a basic unit astronomers use to measure the vast distances in space. To give you a great example of how far a light year actually is, it will takeVoyager 1(NASA’s longest-lived spacecraft) over17,000 yearsto reach 1 light year in distance traveling at a speed of 61...
Distances in space are huge, and often knowing the distance to an object, like 4.5318 billion km (2.8159 billion mi), is less useful than knowing its distance in AU. Using AU as a measurement tells us that Neptune is 30.3 times farther from the Sun than the Earth is....